[jira] [Commented] (FOP-2333) knowing Multi threading issues for FOP 1.1

["Krishankant singh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FOP-2333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14338196#comment-14338196 ] 

Krishankant singh commented on FOP-2333:
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We cached the Teamplates Object for this project and saw a dramatic reduction in CPU usage and it brought stability to the application as well. The CPU usage was halved after implementing this in production environment.

Refer to-
http://www.onjava.com/pub/a/oreilly/java/news/javaxslt_0801.html
http://docstore.mik.ua/orelly/xml/jxslt/ch09_03.htm

> knowing Multi threading issues for FOP 1.1
> ------------------------------------------
>
>                 Key: FOP-2333
>                 URL: https://issues.apache.org/jira/browse/FOP-2333
>             Project: Fop
>          Issue Type: Improvement
>          Components: unqualified
>    Affects Versions: 1.1
>         Environment: Production
>            Reporter: Krishankant singh
>            Priority: Critical
>              Labels: performance
>             Fix For: 1.1
>
>   Original Estimate: 672h
>  Remaining Estimate: 672h
>
> Hi,
> I am a software engineer - java/j2ee
> We have a production application that creates 500 thousand pdf/day and it has implemented fop 0.95  As per current implementation in our code, we have not shared the FopFactory instance for threads. For each thread, we create a new FopFactory  instance, so after 6 or 7 days, the application CPU usage is too high and the application needs to be restarted every 6 - 7 days.
> As we know that creating new  FopFactory instance for each thread is a very costly operation, so to cater to above problem can we share one FopFactory instance for all threads. Are there any problems reported with this approach in fop 1.1 because we can for sure upgrade to fop 1.1 from fop 0.95



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